Cancellation of sale agreemeent

I AM ONE OF THE DIRECTOR OF THE PRIVATE LIMITED COMPANY. WITHOUT ANY BOARD MEETING AND RESOLUTIONS MANAGING DIRECTOR OF THE COMPANY ENTERED INTO THE SALE AGREEMENT FOR A PROPERTY WHICH BELONGS TO THE COMPANY. WITHOUT THE SIGN OF ME HE ENTERED INTO THE SALE AGREEMENT. BUT THE SALE IS NOT EXECUTED. BUT THE PARTY WHO GOT THE SALE AGREEMENT , GOT THE EXPARTE ORDER FOR SALE EXECUTION. HE DIDNT GIVE ANY NOTICE TO ME . IS THE SALE AGREEMENT IS VALID WITHOUT ALL THE DIRECTORS SIGN. AND BOARD MEETING ?PLEASE ADVISE HOW TO CANCEL THIS SALE AGREEMENT.